题目内容
______ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
A. To wait B. Have waited ?
C. Having waited D. To have waited?
C?
解析:
此题考查非谓语形式。该分词短语补充成完整的句子是:When he had waited in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.分词作状语,分词的逻辑主语就是句子主语。由于分词短语的动作在先,所以用现在分词的完成形式。
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